Re: p28 crome. tuner gurus.. welcome.
 

compression was 150~140 all 4. vacuum is about 20~19 @ idle without the ac on and when ac is one.. it's @ 17~16. I mean when it boost it pulls.. maybe I'm running too rich..?

as far as tuning goes.. do I just select the grids and change them one by one?

Re: p28 crome. tuner gurus.. welcome.
 

140 sounds a little low for a d15 but not bad enough to cause that poor of performance.

Excessively rich mixture will cause it to be slow.. and if its real bad you can get gas in your oil which is no good. I wouldnt change anything at all without a wideband hooked up to the car. And if its running as bad as you say, i wouldnt drive it anymore untill i found out what was going on.

Did you ---- with the timing belt at all?

Re: p28 crome. tuner gurus.. welcome.
 

My Ignition was reading -6? I tried hooking up the hulog ---- but I'm still in the process of figuring that ---- out to work properly.. cuz it's not reading anything else. should I advance the timing a little? I know it's running pretty rich cuz it backfires alot and when let go of the gas while driving. ugh..

Re: p28 crome. tuner gurus.. welcome.
 

a d15 should have 16.5* total timing at idle (i think). if you have a timing gun, thats a good place to start. If you dont know what your doing with the datalogging yet, dont rely on that information to be accurate. My car backfires when i let off the gas too

Re: p28 crome. tuner gurus.. welcome.
 

Get your hulog ---- running properly first. There are guides on pgmfi.org that can help you through it, although it isn't really that difficult, it can be finicky sometimes. Then you can really see whats going on. Is it misfiring or breaking up at all?

Re: p28 crome. tuner gurus.. welcome.
 

Alright.. Im gonna get the jaw kit and see what the heck is going on here..

Btw.. Iphone is the ----.